CN114342520A - System information transmission method and communication device - Google Patents

Abstract

The application provides a system information transmission method and a communication device. The method comprises the following steps: acquiring a parameter in the first MIB for indicating a DMRS location of a type-a PDSCH, the parameter being used to acquire a first system information block, SIB1, the first SIB1 including access configuration information of the first device; from this parameter, the first SIB1 is acquired. The first device may be a simple capable terminal device. The application provides a system information transmission method. By releasing/re-interpreting parameters (fields) in the MIB for DMRS locations for type-a PDSCH. For example, this field may be the DMRS-TypeA-Position field in the MIB, indicating that the easy-to-capability terminal device terminal acquires SIB 1. So that the terminal equipment with simple capability acquires the SIB1 and realizes uplink synchronization, cell selection and the like. Normal communication of the terminal equipment with simple capability is guaranteed.

Description

System information transmission method and communication device Technical Field

The present application relates to the field of communications, and in particular, to a method and a device for transmitting system information.

Background

A synchronization signal block, or referred to as a Synchronization Signal (SS)/physical broadcast channel block (PBCH block), is a signal structure. The PBCH contains the most basic system information such as system frame number, intra-frame timing information, etc. The successful reception of the synchronization signal block by the terminal device is a prerequisite for its access to the cell.

The terminal device completes the cell search and synchronization process by correctly receiving a main system information block (MIB) carried in the PBCH. Specifically, the terminal device obtains configuration information required for interpreting a system information block Type 1 (SIB 1) message included in the MIB by receiving the MIB, where the configuration information may include, for example, a control resource set (Coreset) and a Search Space (SS) corresponding to the SIB 1. Obtaining SIB1 according to the corresponding configuration information of SIB1, SIB1 may include the configuration information required by the terminal device to access the system, and the terminal device may implement system access, cell selection, uplink synchronization, etc. according to SIB 1.

A discussion on the access of a simple capability terminal device to an NR system is currently being conducted in New Radio (NR) systems. The terminal equipment with simple capability supports smaller bandwidth, fewer antennas, lower energy consumption, lower cost and the like. The simple capability terminal device has significant difference from the traditional terminal device in the aspects of access capability, supported bandwidth and the like.

For a simple-capability terminal device, since the access capability, supported bandwidth, etc. are lower than those of a conventional terminal device, the process of accessing the system and acquiring the SIB1 is different from that of the conventional terminal device. However, there is currently no special design for how the simple capable terminal device accesses the NR system and acquires SIB 1. Therefore, how to instruct different types of terminals to access the NR system needs to be solved.

Disclosure of Invention

The application provides a system information transmission method and a communication device. By releasing/re-interpreting the parameters (fields) in the MIB for DMRS positions for type-a PDSCH, which may be, for example, the fields of DMRS-type a-Position in the MIB, the terminal device terminal for easy capability is instructed to access the NR system and acquire SIB 1. Therefore, the terminal equipment with simple capability can sequentially and quickly acquire the SIB1 and access the system, thereby realizing uplink synchronization, cell selection and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

In a first aspect, a method for transmitting system information is provided, where an execution subject of the method may be a terminal device or a chip applied to the terminal device. The terminal device may be a simple capable terminal device (or a first apparatus). The method comprises the following steps: acquiring a parameter in the first MIB for indicating a position of a demodulation reference signal, DMRS, of a type-a physical downlink shared channel, PDSCH, the parameter being used for acquiring a first system information block, SIB1, the first SIB1 including access configuration information of a first device; based on the parameters, the first SIB1 is obtained.

The method for MIB transmission provided in the first aspect redefines the content of a field (parameter) indication of a parameter for a demodulation reference signal, DMRS, Position of a type-a PDSCH in the MIB, for example, the field may be a field of DMRS-type a-Position in the MIB. The field is defined for the terminal equipment with simple capability to acquire the corresponding SIB1, so that the terminal equipment with simple capability can acquire the SIB1, thereby sequentially and quickly accessing the system and realizing uplink synchronization, cell selection and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

In a possible implementation manner of the first aspect, the access configuration information of the first apparatus may be configuration information of an access system of the first apparatus, and the access configuration information may be understood as necessary system information required for data transmission between the first apparatus and the network device. For example, the access configuration information may include: configuration information of RACH, configuration information of cell residence and selection, configuration information initiated by access service, scheduling information of other system messages and the like.

In a possible implementation manner of the first aspect, the parameter is used to indicate a control resource set corresponding to the first SIB 1; acquiring the first SIB1 according to the parameter includes:

and detecting a Physical Downlink Control Channel (PDCCH) on a control resource set corresponding to the first SIB1 indicated by the parameter, wherein the PDCCH is used for scheduling a Physical Downlink Shared Channel (PDSCH) carrying the first SIB 1. In this implementation manner, the parameter of the DMRS position of the demodulation reference signal used for the type a PDSCH indicates the control resource set corresponding to the first SIB1, so that the terminal device can acquire the first SIB1, thereby improving the accuracy of acquiring the first SIB1 by the terminal device, and facilitating implementation.

In a first possible implementation manner of the first aspect, the control resource set corresponding to the first SIB1 is the same as or different from the control resource set corresponding to the second SIB1, where the first MIB includes a first parameter, the first parameter is used to indicate the control resource set corresponding to the second SIB1, and the second SIB1 includes access configuration information of the second apparatus.

In a possible implementation manner of the first aspect, the access configuration information of the second apparatus may be configuration information of the second apparatus accessing the system, and the access configuration information may be understood as necessary system information required for data transmission between the second apparatus and the network device. For example, it includes: configuration information of RACH, configuration information of cell residence and selection, configuration information initiated by access service, scheduling information of other system messages and the like.

In a possible implementation manner of the first aspect, when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, the first SIB1 in the PDSCH is acquired according to downlink control information DCI carried by a PDCCH in the control resource set corresponding to the first SIB1 and first information, where the first information is predefined or configured through higher layer signaling. In this implementation, the length (detection range) of DCI read by the terminal device can be reduced by configuring information or values of indications of certain fields (parameters) in DCI in a predefined manner or through higher layer signaling, so that the complexity of DCI read by the terminal device is effectively reduced, and the energy consumption of the terminal device is reduced.

In a possible implementation manner of the first aspect, the first information may include: one or more of MCS, number of HARQ processes, NDI, RV field, etc. The terminal device may directly adopt a value predefined or configured through higher layer signaling without reading one or more of the MCS field, HARQ process number field, NDI field, RV field in the DCI.

In a possible implementation manner of the first aspect, when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, the first SIB1 in the PDSCH is acquired according to the downlink control information DCI carried by the first PDCCH. The first PDCCH is a PDCCH in the control resource set corresponding to the first SIB1, the first PDCCH is scrambled by a first Radio Network Temporary Identifier (RNTI), the second PDCCH is a PDCCH in the control resource set corresponding to the second SIB1, the second PDCCH is scrambled by a second RNTI, the first PDCCH is different from the second PDCCH, and the first RNTI is different from the second RNTI.

In a possible implementation manner of the first aspect, the first RNTI may be a first U-RNTI, or the first RNTI is a first C-RNTI. The second RNTI may be a second U-RNTI or a second C-RNTI. The first U-RNTI is different from the second U-RNTI, and the first C-RNTI is different from the second C-RNTI.

In one possible implementation of the first aspect, the parameter is used to indicate that the first SIB1 is received at a first time-frequency location, where the first time-frequency location is predefined or configured through higher layer signaling. In this implementation, the terminal may receive the first SIB1 on the PDSCH directly according to the indicated time-frequency resource location. The accuracy and efficiency of acquiring the first SIB1 by the first terminal device can be improved, and implementation is facilitated.

In a possible implementation manner of the first aspect, the parameter is used to indicate a first physical broadcast channel PBCH corresponding to the first SIB1, and acquiring the first SIB1 according to the parameter includes: and acquiring the first SIB1 according to the first PBCH, wherein the time-frequency resource position of the first PBCH is predefined or configured through high-layer signaling. In this implementation, by indicating the first PBCH corresponding to the first SIB1, the terminal may directly indicate the first PBCH according to the parameter of the DMRS position of the demodulation reference signal for the type-a PDSCH, acquire the configuration information of the first SIB1 in the first PBCH, and further acquire the first SIB1, so that the terminal device may sequentially and quickly access the system and implement uplink synchronization, cell selection, and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

In one possible implementation of the first aspect, the parameter is used to indicate whether there is an update to the first SIB 1.

In a possible implementation manner of the first aspect, when the parameter indicates that there is no update in the first SIB1, acquiring the first SIB1 according to the parameter includes: based on this parameter, the previous SIB1 is determined to be the first SIB1, and the previous SIB1 is the last SIB1 acquired by the first device. In this implementation, when the parameter of the demodulation reference signal, DMRS, position for the type a PDSCH indicates that there is no update of the first SIB1, the first terminal device may directly determine the SIB1 that was previously acquired as the first SIB 1. The terminal device need not perform the various steps and procedures of acquiring the first SIB1 from the first SIB1 configuration information included in the currently received first MIB. The complexity of acquiring the first SIB1 by the terminal device can be reduced, and the power consumption of the terminal device can be reduced.

In a possible implementation manner of the first aspect, when the parameter indicates that there is an update in the first SIB1, acquiring the first SIB1 according to the parameter includes: and acquiring the first SIB1 according to the configuration information of the first SIB1 indicated in the first MIB.

In a possible implementation manner of the first aspect, when the mapping type of the PDSCH carrying the first SIB1 is type a, the time domain symbol position where the first DMRS of the PDSCH carrying the first SIB1 is located is the 4 th time domain symbol in the time unit where the PDSCH is located.

In a possible implementation of the first aspect, the predefined may be understood as defined by a protocol. The signaling configuration may be understood as being configured by higher layer or physical layer signaling. The higher layer signaling may include, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) Control Element (CE), Radio Link Control (RLC) signaling, and the like. The physical layer signaling may include, for example, Downlink Control Information (DCI), signaling transmitted through a downlink physical layer channel, and the like, and the physical downlink channel may be, for example, a PDCCH, a PDSCH, or the like.

In a possible implementation manner of the first aspect, the parameter (field) for the DMRS Position of the demodulation reference signal for the type-a PDSCH is a DMRS-type a-Position parameter (field).

In a second aspect, a method for transmitting system information is provided, where an execution subject of the method may be a network device or a chip applied to the network device. The method comprises the following steps: determining a first master information block, MIB, comprising a parameter indicating a demodulation reference signal, DMRS, position for a type-a physical downlink shared channel, PDSCH, the parameter indicating a first system information block, SIB1, the first SIB1 comprising access configuration information of a first device. Sending the first MIB.

The second aspect provides a method for MIB transmission by redefining the content of a field (parameter) indication of a parameter for a demodulation reference signal, DMRS, Position of a type-a PDSCH in a MIB, e.g., the field may be a field of DMRS-type a-Position in the MIB. The field is defined for the terminal equipment with simple capability to acquire the corresponding SIB1, so that the terminal equipment with simple capability can acquire the SIB1, thereby sequentially and quickly accessing the system and realizing uplink synchronization, cell selection and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

In one possible implementation of the second aspect, the parameter is used to indicate a control resource set to which the first SIB1 corresponds. In this implementation manner, the parameter of the DMRS position of the demodulation reference signal used for the type a PDSCH indicates the control resource set corresponding to the first SIB1, so that the accuracy of acquiring the first SIB1 by the terminal device can be improved, and implementation is facilitated.

In a possible implementation manner of the second aspect, the control resource set corresponding to the first SIB1 is the same as or different from the control resource set corresponding to the second SIB1, where the first MIB includes a first parameter, the first parameter is used to indicate the control resource set corresponding to the second SIB1, and the second SIB1 includes access configuration information of the second apparatus.

In a possible implementation manner of the second aspect, when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, the first information in the downlink control information DCI carried by the PDCCH in the control resource set corresponding to the first SIB1 is predefined or configured through higher layer signaling. In this implementation manner, information or values indicated by some fields (parameters) in the DCI are configured through predefined or through high-layer signaling, and when the terminal device and the second terminal detect the same DCI, the length (detection range) of the DCI read by the terminal device can be reduced, which effectively reduces the complexity of the DCI read by the terminal device and reduces the energy consumption of the terminal device.

In a possible implementation manner of the second aspect, the first information may include: one or more of MCS, number of HARQ processes, NDI, RV field, etc. The terminal device may directly adopt a value predefined or configured through higher layer signaling without reading one or more of the MCS field, HARQ process number field, NDI field, RV field in the DCI.

In a possible implementation manner of the second aspect, when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, a first PDCCH is scrambled by using a first RNTI, and a second PDCCH is scrambled by using a second RNTI, where the first PDCCH is a PDCCH in the control resource set corresponding to the first SIB1, the second PDCCH is a PDCCH in the control resource set corresponding to the second SIB1, the first PDCCH is different from the second PDCCH, and the first RNTI is different from the second RNTI.

In one possible implementation of the second aspect, the parameter is used to indicate that the first SIB1 is located at the first time-frequency location. Wherein the first time frequency location is predefined or configured by higher layer signaling. In this implementation, the terminal may receive the first SIB1 on the PDSCH directly according to the indicated time-frequency resource location. The accuracy and efficiency of acquiring the first SIB1 by the first terminal device can be improved, and implementation is facilitated.

In a possible implementation manner of the second aspect, the parameter is used to indicate a first physical broadcast channel PBCH corresponding to the first SIB1, and a time-frequency resource location of the first PBCH is predefined or configured through higher layer signaling. In this implementation, by indicating the first PBCH corresponding to the first SIB1, the terminal may directly indicate the first PBCH according to the parameter of the DMRS position of the demodulation reference signal for the type-a PDSCH, acquire the configuration information of the first SIB1 in the first PBCH, and further acquire the first SIB1, so that the terminal device may sequentially and quickly access the system and implement uplink synchronization, cell selection, and the like. The method and the device ensure normal communication of the middle terminal equipment with simple capability and improve communication efficiency.

In one possible implementation of the second aspect, the parameter is used to indicate whether there is an update to the first SIB 1. In this implementation, when the parameter of the demodulation reference signal DMRS location for the type a PDSCH indicates whether there is an update to the first SIB1, when there is no update, the terminal device may directly determine the previously acquired SIB1 as the first SIB 1. The terminal device need not perform the various steps and procedures of acquiring the first SIB1 from the first SIB1 configuration information included in the currently received first MIB. The complexity of acquiring the first SIB1 by the terminal device can be reduced, and the power consumption of the terminal device can be reduced.

In a possible implementation manner of the second aspect, when the mapping type of the PDSCH carrying the first SIB1 is type a, the time domain symbol position where the first DMRS of the PDSCH carrying the first SIB1 is located is the 4 th time domain symbol in the time unit where the PDSCH is located.

In one possible implementation of the second aspect, the parameter (field) for the DMRS Position of the demodulation reference signal for the type-a PDSCH is a DMRS-type a-Position parameter (field).

In a third aspect, there is provided a communication device comprising means for performing the steps of the above first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, there is provided a communication device comprising means for performing the steps of the second aspect above or any possible implementation manner of the second aspect.

In a fifth aspect, there is provided a communication apparatus comprising at least one processor and a memory, the at least one processor being configured to perform the method of the first aspect above or any possible implementation manner of the first aspect.

In a sixth aspect, there is provided a communications apparatus comprising at least one processor and a memory, the at least one processor being configured to perform the method of the second aspect above or any possible implementation manner of the second aspect.

In a seventh aspect, a communication device is provided, which comprises at least one processor configured to perform the method of the above first aspect or any possible implementation manner of the first aspect, and an interface circuit.

In an eighth aspect, there is provided a communications apparatus comprising at least one processor configured to perform the method of the second aspect above or any possible implementation of the second aspect, and an interface circuit.

In a ninth aspect, a terminal device is provided, which may be a simple-capability terminal device. The terminal device comprises the communication apparatus provided in the third aspect, or the terminal device comprises the communication apparatus provided in the fifth aspect, or the terminal device comprises the communication apparatus provided in the seventh aspect.

A tenth aspect provides a network device, which includes the communication apparatus provided in the fourth aspect, or a terminal device includes the communication apparatus provided in the sixth aspect, or a terminal device includes the communication apparatus provided in the eighth aspect.

In an eleventh aspect, a computer program product is provided, which comprises a computer program for performing the method of the first aspect or any possible implementation of the first aspect, or for performing the method of the second aspect or any possible implementation of the second aspect, when the computer program is executed by a processor.

In a twelfth aspect, a computer-readable storage medium is provided, having stored thereon a computer program for performing the method of the first aspect or any possible implementation form of the first aspect, or for performing the method of the second aspect or any possible implementation form of the second aspect, when the computer program is executed.

In a thirteenth aspect, a communication system is provided, which comprises the above simple terminal device and network device. Optionally, the communication system may further comprise normal capable terminal devices.

In a fourteenth aspect, there is provided a chip, comprising: a processor configured to call and run the computer program from the memory, so that the communication device on which the chip is installed executes the method of the first aspect or any possible implementation manner of the first aspect, or executes the method of the second aspect or any possible implementation manner of the second aspect.

The embodiment of the application provides a system information transmission method and a communication device. By releasing/re-interpreting a field (parameter) for DMRS Position for Type-a PDSCH in the MIB, which may be, for example, a field for DMRS-Type a-Position in the MIB, a terminal device terminal of easy capability is instructed to access the NR system and acquire SIB 1. Therefore, the terminal equipment with simple capability can sequentially and quickly acquire the SIB1 and access the system, thereby realizing uplink synchronization, cell selection and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of one possible structure of a synchronization signal block.

Fig. 2 is a schematic diagram illustrating an architecture of a mobile communication system according to an embodiment of the present application.

Fig. 3 is a schematic interaction diagram of an example of a transmission method of system information according to an embodiment of the present application.

Fig. 4 is a schematic interaction diagram of another system information transmission method provided in the embodiment of the present application.

Fig. 5 is a schematic interaction diagram of another system information transmission method provided in the embodiment of the present application.

Fig. 6 is a schematic block diagram of a communication device provided in an embodiment of the present application.

Fig. 7 is a schematic block diagram of another example of a communication device provided in an embodiment of the present application.

Fig. 8 is a schematic block diagram of another example communication device provided in the embodiment of the present application.

Fig. 9 is a schematic block diagram of another example of a communication device provided in an embodiment of the present application.

Fig. 10 is a schematic block diagram of a terminal device provided in an embodiment of the present application.

Fig. 11 is a schematic block diagram of another example of a terminal device provided in an embodiment of the present application.

Fig. 12 is a schematic block diagram of a network device provided in an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, a LTE Frequency Division Duplex (FDD) System, a LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a world Interoperability for Microwave Access (WiMAX) communication System, a future fifth Generation (5G) System, a New Radio Network (NR), or other future communication systems.

Terminal equipment in the embodiments of the present application may refer to user equipment, access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The Network device in the embodiment of the present application may be a device for communicating with a terminal device, where the Network device may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) System or a Code Division Multiple Access (CDMA) System, may also be a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) System, may also be an evolved node b (eNB, or eNodeB) in an LTE System, and may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, a network device in a future evolved PLMN network, or a network device in another type of future communication system, and the like, and the embodiment of the present application is not limited.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

A Synchronization signal block, or referred to as a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block, is a signal structure suitable for use in 5G and beyond communication systems. Fig. 1 is a schematic diagram of one possible structure of a Synchronization Signal block, which includes a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH), as shown in fig. 1. The PSS and SSS mainly serve to help the ue identify and synchronize with the cell, and the PBCH contains the most basic system information such as the system frame number, intra-frame timing information, etc. The successful reception of the synchronization signal block by the user equipment is a prerequisite for its access to the cell.

After the terminal device is powered on, it needs to access a cell by performing a cell search (random access procedure). Mainly relates to the following processes:

the terminal device completes Orthogonal Frequency Division Multiplexing (OFDM) symbol boundary synchronization and coarse frequency synchronization through the PSS, and obtains a cell Identity (ID) 2.

The terminal device obtains cell identification 1(ID1) through SSS, and calculates a cell ID using cell ID1 and cell ID 1. Here, the cell ID is 3 × cell ID1+ cell ID 2. In addition, the secondary synchronization signal can also be used for radio resource management related measurement and radio link detection related measurement.

The terminal device completes the cell search and synchronization process by correctly receiving a Master Information Block (MIB) carried in the PBCH. Specifically, the terminal device receives the MIB message to obtain a system frame number and a field indication, thereby completing radio frame timing and field timing. Meanwhile, the terminal equipment determines the time slot and the symbol of the current synchronous signal through the synchronous broadcast block Index (SSB Index) in the MIB message and the synchronous broadcast block set pattern adopted by the current frequency band, and completes time slot synchronization.

Generally, the terminal device needs to go through the following procedures to perform normal interpretation of a plurality of system information:

completing time-frequency synchronization and cell ID acquisition of the terminal equipment through the PSS and the SSS;

performing channel estimation through a modulation demodulation reference signal (DMRS) in the PBCH, completing correct demodulation of the PBCH, and reading an MIB message in the PBCH;

the method includes acquiring configuration information of a Physical Downlink Control Channel (PDCCH) required for decoding a system information block Type 1 (SIB 1) message through a message in an MIB, where the configuration information includes a control resource set (Coreset) and a search space (search space, SS), detecting the PDCCH according to the Coreset and the SS, and detecting a Physical Downlink Shared Channel (PDSCH) according to a detected scheduling indication in the PDCCH (i.e., a scheduling indication of Downlink Control Information (DCI) in the PDCCH). For example, the DCI may include: time frequency resources corresponding to the PDSCH, data modulation mode corresponding to PDSCH Transmission information, Transmission Block Size (TBS), power configuration, and the like. After receiving the PDSCH, reading the information of SIB1 in the PDSCH is performed. Wherein SIB1 is carried in PDSCH. Alternatively, the MIB may also be considered to include scheduling information of SIB 1;

according to the related configuration Information included in SIB1, other System Information (SI) is obtained for the terminal device to perform uplink synchronization.

Table 1 is a schematic table of a number of bits (fields) carried by the MIB and a functional description.

TABLE 1

NR currently carries out a discussion about the access of simple capability terminal devices to NR systems. For simple capability terminal equipment in mass machine type communication (mtc), smaller bandwidth, fewer antenna numbers, lower energy consumption, lower cost, and the like are supported. The simple capability terminal device may also be referred to as an NR-Light terminal device. Therefore, the NR-Light terminal device has significant differences from conventional enhanced mobile broadband (eMBB) terminal devices and high-reliability low-latency communication (URLLC) terminal devices in terms of access capability, supported bandwidth, and the like.

It should be noted here that typeA is one of PDSCH mapping types, for example, the PDSCH mapping type may include typeA and typeB. Optionally, these types may be distinguished by DMRS types. When performing time-frequency resource mapping on the PDSCH, the mapping start position S and the length L of the continuous physical resource block PRB (which may be understood as the number of consecutive PRBs) need to be considered. For two mapping types of typeA and typeB, the value range of S, the value range of L and the value range of the sum of S and L are different. Reference is not made to the details provided herein, which are not intended to be limiting, but rather are made to the state of the art or to the possible definitions of future communication systems. In addition, typeA and typeB only represent two different types, alternatively, typeA may be referred to as a first type and typeB may be referred to as a second type, subject to being able to distinguish between different PDSCH mapping types, or may also be used to distinguish between other possible PDSCH types.

Currently, for a terminal device accessing an NR system, it is necessary to read the MIB information indication carried in the PBCH, perform correct interpretation of the PDCCH related to SIB1 on the corresponding Coreset and search space, and finally acquire SIB 1. And for the terminal equipment with simple capability, because the access capability, the supported bandwidth and the like of the terminal equipment are lower than those of the traditional eMB and URLLC terminal equipment, the process of accessing the system and acquiring the SIB1 is different from those of the traditional eMB and URLLC terminal equipment. For example, the terminal device with simple capability supports smaller number of blind tests and smaller bandwidth. It is necessary to design dedicated configuration information (or may also be referred to as SIB1 scheduling information) related to acquiring SIB1 for the easy-capability terminal device, so that the easy-capability terminal device can also sequentially and rapidly access the system and acquire SIB1, thereby implementing system access, cell selection, uplink synchronization, and the like. However, there is currently no special design for how the simple capable terminal device accesses the NR system and acquires SIB 1. Especially when legacy eMBB and URLLC terminal devices coexist with easy-to-capability terminal device terminals, more messages in the MIB are required to indicate different access information for different types of terminals. And the number of spare bits available in the MIB is small. Therefore, how to instruct different types of terminals to access the NR system needs to be solved.

In view of the above, the present application provides a method for master information block transmission MIB, which indicates a terminal device with simple capability to access an NR system and acquire SIB1 by releasing/re-interpreting a field (parameter) in the MIB for DMRS location of Type-a PDSCH, for example, the field may be a field of DMRS-Type a-Position in MIB. Therefore, the terminal equipment with simple capability can quickly acquire the SIB1 and access the system, thereby realizing uplink synchronization, cell selection and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

For the understanding of the embodiments of the present application, a communication system suitable for the embodiments of the present application will be briefly described with reference to fig. 2.

Fig. 2 is a schematic diagram of a communication system 100 suitable for use in the method of primary system information transmission of the embodiments of the present application. As shown in fig. 2, the communication system 100 includes four communication devices, for example, a network device 110, and terminal devices 121 to 123. The terminal devices 121 to 123 may be all simple-capability terminal devices, or the terminal devices 121 to 123 include simple-capability terminal devices and conventional eMBB and URLLC terminal devices. When at least one of the terminal devices 121 to 123 accesses the system, the method provided by the present application may be utilized to access the system with the network device 110 and acquire the SIB 1.

It should be understood that more network nodes, such as terminal devices or network devices, may also be included in the communication system shown in fig. 2, and the network devices or terminal devices included in the communication system shown in fig. 2 may be network devices or terminal devices in various forms as described above. The embodiments of the present application are not shown in the figures one by one.

Fig. 3 is a schematic interaction diagram of a MIB transmission method 200 according to an embodiment of the present application, where the MIB transmission method 200 may be applied to the scenario shown in fig. 2, and of course, may also be applied to other communication scenarios, and the embodiment of the present application is not limited herein.

It should also be understood that, in the embodiments of the present application, the first terminal device and the network device are taken as examples of the execution subject of the execution method, and the method is described. By way of example and not limitation, the execution subject of the execution method may also be a chip, a system-on-chip, or a processor, etc. applied to the first terminal device and the network device. The first terminal device may be a simple capable terminal device.

As shown in fig. 3, the method 200 shown in fig. 3 may include S210 to S240. The various steps in method 200 are described in detail below in conjunction with fig. 3.

S210, the network equipment determines a first MIB, wherein the first MIB comprises a parameter for indicating a position of a demodulation reference signal (DMRS) of the type-A PDSCH, and the parameter for indicating the position of the DMRS of the type-A PDSCH is used for the first terminal equipment to acquire a first system information block SIB1, and the first SIB1 comprises access configuration information of the first terminal equipment. The first device may be a terminal device with simple capability. In the following description, a terminal device in which the first terminal device represents the easy capability will be described as an example. In the present application, the expressions "first means" and "first terminal device" may be interchanged. Alternatively, the type a PDSCH in the present application may also be referred to as a first type PDSCH, and the PDSCH is resource mapped by a first type mapping manner.

It should be noted that "access configuration information" stated in this application is configuration information required by a corresponding terminal device to access a system. The access configuration information of the first device may be configuration information of the first device accessing the system, and the access configuration information of the second device may be configuration information of the second device accessing the system. Therefore, the access configuration information can be understood as necessary system information required for data transmission between the terminal device and the network device. For example, configuration information of a Random Access Channel (RACH), configuration information of cell residence and selection, configuration information of access service initiation, scheduling information of other system messages, and the like. The present application does not limit the specific content included in the access configuration information.

S220, the network device sends the first MIB to the first terminal device. Correspondingly, the first terminal equipment receives the first MIB.

S230, the first terminal device obtains the parameter used for indicating the position of the DMRS of the PDSCH, in the first MIB, and the parameter used for indicating the position of the DMRS of the PDSCH is used for obtaining the first system information block SIB1, where the first SIB1 includes access configuration information of the first terminal device.

S240, the first terminal device acquires the first SIB1 according to the parameter.

Specifically, in S210, during the cell access and selection process, the network device may determine (may also be understood as generating, i.e., the first MIB is necessarily determined or generated by the network device before the network device transmits the first MIB) the first MIB. The first MIB may be carried in a first PBCH sent by a network device. The first MIB includes a parameter for indicating a demodulation reference signal, DMRS, position of the type-a PDSCH. For example, the parameter for indicating the demodulation reference signal DMRS Position of the type-a PDSCH may be a DMRS-type a-Position field included in the first MIB. As for the information included in the first MIB, reference may be made to the contents shown in table 1, which are not described herein for brevity.

It should be understood that, in the following description of the present application, the parameter (field) for indicating the DMRS Position of the demodulation reference signal of the type-a PDSCH is described by taking the DMRS-type a-Position field as an example, and it should be understood that, in the embodiment of the present application, the parameter for indicating the DMRS Position of the demodulation reference signal of the type-a PDSCH may also be another field (parameter) included in the first MIB or a field (parameter) newly added to the first MIB as long as the field (parameter) is used for indicating the DMRS Position of the demodulation reference signal of the type-a PDSCH, and the present application is not limited thereto.

It should also be understood that in the embodiment of the present application, other fields (e.g., reserved field) of the first MIB may also be used for the first terminal device to acquire the first SIB 1. That is, the field (parameter) for the first terminal device to acquire the first SIB1 may not be the parameter (field) indicating the demodulation reference signal, DMRS, position of the type-a PDSCH, but may be other fields (parameters) of the first MIB, which are used for the first terminal device to acquire the first SIB 1. The application is not limited herein.

The PDSCH mapping type mainly determines the time domain symbol position of DMRS of PDSCH. The Dmrs-type a-Position field is mainly used to indicate a location of a first Dmrs of the PDSCH within a time unit (e.g., a time slot) where the PDSCH is located when the PDSCH is mapped to type a. Wherein the Dmrs-TypeA-Position may indicate that the Position of the first Dmrs is at the 3 rd or 4 th time domain symbol of a slot (slot) where the PDSCH is located.

It should be understood that, in this embodiment of the present application, for a first terminal device (a terminal device with simple capability), regardless of whether the value of the Dmrs-type a-Position field is 0 or 1, when the mapping type of the PDSCH carrying the first SIB1 is type a, the time domain symbol Position where the first Dmrs of the PDSCH corresponding to the first terminal device (or may also be referred to as the PDSCH carrying the first SIB1) is located is the 4 th time domain symbol in the time unit (e.g., the timeslot) where the PDSCH is located. That is, when the mapping type of the PDSCH corresponding to the first terminal device is fixed to type a, the position of the pre-DMRS symbol is the 4 th time domain symbol.

In this embodiment, a Dmrs-type a-Position field in the first MIB is used by the first terminal device to obtain the first SIB1, where the first SIB1 includes access configuration information of the first terminal device.

At S220, the network device sends the first MIB to the first terminal device. Specifically, after determining the first MIB, the network device sends the first MIB to the first terminal device through the first PBCH (or the first SSB). Namely, the first MIB is carried in the first PBCH. The network device sends a first PBCH (or a first SSB) to the first terminal device, where the first PBCH (or the first SSB) carries the first MIB. Correspondingly, the first terminal device obtains the first MIB in the first PBCH by receiving the first PBCH.

In S230, after the first terminal device obtains the first MIB, the first terminal device reads the Dmrs-TypeA-Position field in the first MIB. Wherein the Dmrs-TypeA-Position field is used for the first terminal equipment to acquire the first SIB 1. The first SIB1 is corresponding to a first terminal device, the first SIB1 comprises access configuration information of the first terminal device.

For example, the first SIB1 may be used for system access and cell selection, uplink synchronization, and the like by a simple-capable terminal device.

Optionally, in this embodiment of the present application, the first SIB1 may include one or more of the following information:

cell selection parameters: the first terminal equipment judges whether the signal of the cell meets the necessary information of the cell residence condition;

access control parameters: the first terminal equipment judges whether a certain type of access service is allowed to be initiated or not;

the method comprises the steps that first terminal equipment initially accesses relevant channel configuration information and configuration information required in a random access process;

requesting configuration information by a system message of a first terminal device;

scheduling information of other system messages of the first terminal device;

some other information of the first terminal device, such as whether Voice over IP (VoIP) service is supported, etc.

In S240, the first terminal device acquires the Dmrs-type a-Position field, and may acquire the first SIB1 according to an indication of the Dmrs-type a-Position field. According to the first SIB1, the first SIB1 can be obtained, and the first terminal device can sequentially and quickly access the system and obtain the SIB1, so that system access, cell selection, uplink synchronization, and the like are achieved, normal communication of the terminal device with simple capability is guaranteed, and communication efficiency is improved.

It should be understood that for a terminal equipment with normal capability (hereinafter referred to as a second terminal equipment, which may also be referred to as a second device), for example, a conventional enhanced mobile broadband (eMBB) terminal equipment and a high-reliable low-latency communication (URLLC) terminal equipment. The second terminal device may acquire the configuration information related to the SIB1 (hereinafter referred to as the second SIB1) corresponding to the second terminal device from the pdcch-ConfigSIB1 field in the first MIB. The field of PDCCH-ConfigSIB1 is used to indicate the configuration of the PDCCH related to the second SIB1, including the Coreset where the PDCCH is located, the search space, and the like, so that the second SIB1 is acquired. The second SIB1 comprises information for the second terminal device to enable cell access, cell selection and uplink synchronization related. In the present application, the expressions "second device" and "second terminal apparatus" may be interchanged

It should also be understood that, for the second terminal device, when the mapping type of the PDSCH carrying the second SIB1 is type a, it needs to determine, according to the indication of Dmrs-type a-Position, whether the time domain symbol Position where the first Dmrs of the PDSCH corresponding to the second terminal device (or may also be referred to as the PDSCH carrying the second SIB1) is located is the 4 th time domain symbol or the 3 rd slot symbol in the time unit (e.g., the slot) where the PDSCH is located. For example, when DMRS-TypeA-Position is 0, a preamble DMRS of the PDSCH starts from a 3 rd time domain symbol; when DMRS-TypeA-Position is 1, a preamble DMRS of the PDSCH starts from a 4 th time domain symbol.

According to the method for transmitting the MIB, the content indicated by the field (parameter) of the parameter of the demodulation reference signal (DMRS) Position for the type-A PDSCH in the MIB is redefined, and the field can be a field of DMRS-type A-Position in the MIB. The field is defined for the terminal equipment with simple capability to acquire the corresponding SIB1, so that the terminal equipment with simple capability can acquire the SIB1, thereby sequentially and quickly accessing the system and realizing uplink synchronization, cell selection and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

Optionally, in some possible implementations of the present application, the Dmrs-type a-Position is used to indicate the control resource set corresponding to the first SIB 1. As shown in fig. 4, fig. 4 is a schematic flowchart of a method for MIB transmission in some embodiments of the present application, and based on the method steps shown in fig. 3, S240 in the method, the first terminal device acquires the first SIB1 according to the Dmrs-type a-Position field, including: and S241.

S241, the first terminal device detects a PDCCH on the control resource set corresponding to the first SIB1 indicated by the Dmrs-type a-Position field, where the PDCCH is used to schedule a PDSCH carrying the first SIB 1.

S242, the first terminal device acquires the first SIB1 carried on the PDSCH.

For reference, the above description about S210, S220, and S230 may be referred to in steps S210, S220, and S230 shown in fig. 4, and for brevity, the description is not repeated here.

In S241, the Dmrs-type a-Position field may indicate a control resource set (hereinafter referred to as a first control resource set) corresponding to the first SIB 1.

The first terminal device may determine a time-frequency location of the first set of control resources according to the Dmrs-TypeA-Position field. Controlling a resource set can be understood as: certain specific time frequency resources are adopted on the time frequency resources in the system to bear the control channels, and the specific time frequency resources are notified to the terminal equipment through a high-level signaling in advance, so that the terminal equipment can detect the control channels on the specific time frequency resources at the subsequent specific detection moment. The control resource set includes time-frequency resource information occupied by a network device for sending a control channel (e.g., PDCCH), the network device may configure one or more control resource sets for the terminal device, and the network device may send the control channel to the terminal device on any control resource set corresponding to the terminal device. The terminal device may receive the control channel sent by the network device on the time-frequency resource indicated by the control resource set. The first terminal device may determine a time-frequency Position of a control resource set (first control resource set) according to the indication of the Dmrs-type a-Position field. Wherein the time-frequency location of the first set of control resources may be protocol predefined or higher layer signaling configured. The first terminal device may detect PDCCH on the first set of control resources. Wherein the PDCCH carries DCI, and the DCI is used for scheduling the PDSCH carrying the first SIB 1. For example, the DCI may include: time frequency resources corresponding to the PDSCH, data modulation mode corresponding to PDSCH Transmission information, Transmission Block Size (TBS), power configuration, and the like. The first terminal device may receive the PDSCH according to the DCI.

In S242, the first terminal device receives the PDSCH, and may acquire the first SIB1 carried on the PDSCH.

It should be understood that, in the embodiment of the present application, the time-frequency Position of the control resource set indicated by the Dmrs-TypeA-Position field may be predefined by a protocol or configured by higher layer signaling. The time-frequency location of the first SIB1 on PDSCH may also be protocol predefined or higher layer signaling configured. For example, when the Dmrs-TypeA-Position field indicates 1, there corresponds to a pre-configured or pre-defined set of control resources. When the Dmrs-TypeA-Position field indicates 0, it corresponds to another pre-configured or predefined set of control resources. I.e. there may also be a correspondence between the value indicated by the Dmrs-TypeA-Position field and the control resource set. The correspondence may also be protocol predefined or configured by higher layer signaling.

The control resource set corresponding to the first SIB1 is indicated by the Dmrs-TypeA-Position field, so that the first terminal device may acquire the first SIB 1. The accuracy of acquiring the first SIB1 by the first terminal device can be improved, and implementation is facilitated.

Since the first parameter (e.g. the pdcch-ConfigSIB1 field) in the first MIB may also indicate the control resource set of the corresponding second SIB1 of the second terminal device. In the embodiment of the present application, the Dmrs-type a-Position field indicates that a control resource set (hereinafter, referred to as a first control resource set) may be the same as or different from a control resource set (hereinafter, referred to as a second control resource set) indicated by the pdcch-ConfigSIB1 field. Wherein the second set of control resources is used for the second terminal device to acquire the second SIB 1. The second SIB1 comprises access configuration information for the second terminal device.

Optionally, the second SIB1 may include one or more of the following information:

cell selection parameters: the second terminal equipment judges whether the signal of the cell meets the necessary information of the cell residence condition;

access control parameters: the second terminal equipment judges whether the access service of a certain type is allowed to be initiated or not;

the second terminal device initially accesses the related channel configuration information and the necessary configuration information in the random access process;

requesting configuration information by a system message of the second terminal equipment;

scheduling information of other system messages of the second terminal device;

some other information.

The Coreset in the initial access procedure may be referred to as Coreset0 because its time-frequency position is predefined in the initial access procedure, that is, the field of the pdcch-ConfigSIB1 in the first MIB indicates Coreset0 in the initial access procedure. Wherein, the frequency range (frequency domain position and bandwidth) of Coreset0 is identical to the bandwidth part (BWP) at initial access, and BWP can be understood as the time-frequency resource for transmitting the first pbch (ssb).

Therefore, in the embodiment of the present application, when the first control resource set indicated by the Dmrs-type a-Position field is different from the second control resource set indicated by the pdcch-ConfigSIB1 field, the number of Physical Resource Blocks (PRBs) occupied by the first control resource set or the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied by the first control resource set may be predefined or configured at a higher layer. Or the deviation of the first control Resource set lower boundary and the first PBCH lower boundary, which may be in units of Resource Blocks (RBs) corresponding to the subcarrier spacing of Coreset0, is predefined or configured higher layer.

Optionally, the first set of control resources indicated by the Dmrs-TypeA-Position field may also be Coreset 0.

During the initial access, the pdcch-ConfigSIB1 field in the first MIB may also indicate the deviation of the lower boundary of Coreset0 and the first PBCH lower boundary, which may be in units of Resource Blocks (RBs) corresponding to the subcarrier spacing of Coreset 0. For example, the high 4 bit indication of the pdcch-ConfigSIB1 field may be utilized.

Optionally, in some embodiments of the present application, when the first set of control resources is the same as the second set of control resources, the first terminal device may obtain the first SIB1 in the PDSCH according to DCI carried by the PDCCH in the first set of control resources and first information, where the first information is predefined or configured through higher layer signaling.

Specifically, when the first set of control resources is the same as the second set of control resources, for example, Coreset0 is both. And, the first terminal device and the second terminal need to detect PDCCH on the control resource set, i.e. the first terminal device and the second terminal detect DCI on the same control resource set. The first terminal device and the second terminal device may read the DCI in different manners. For example, assume that the DCI is 10 bits long, including an indication of four different fields. The meaning of a part of the 10 bits (or a part of the field) may be predetermined or higher layer signaling configured for the first terminal device. For example, a Modulation and Coding Scheme (MCS) field (or may also be referred to as a parameter MCS) in the DCI indicates that the MCS is predefined. The first terminal device may not read the MCS field when reading the DCI, where the MCS field may be the first information. That is, the first information may be information indicated by certain fields in the DCI, which are predefined or configured through higher layer signaling. When reading the DCI, the first terminal device does not read the field corresponding to the first information in the DCI, but utilizes information predefined or configured by higher layer signaling. For fields not predefined in the DCI or configured by higher layer signaling, the first terminal device needs to read the information of these fields. That is, the first terminal device may acquire the first SIB1 in the PDSCH according to the DCI carried by the PDCCH in the first control resource set and the first information. Wherein the first information may be information indicated by certain fields in the DCI, and the first information is predefined or configured through higher layer signaling.

For the second terminal device, the whole DCI needs to be read to acquire the second SIB1 in the PDSCH. That is, the lengths of the DCI that the first terminal device and the second terminal device need to read are different for the same DCI. For the first terminal device, after blind-detecting the DCI in the PDCCH, a part of bits (bit) in the DCI may be directly used with predefined first information without interpretation.

Optionally, in this embodiment of the application, the first information may include: one or more of MCS, hybrid automatic repeat request (HARQ) process number (HARQ process number), New Data Indicator (NDI), Redundancy Version (RV), and the like. The first terminal device may directly adopt a value predefined or configured through higher layer signaling without reading one or more of the MCS field, HARQ process number field, NDI field, RV field in the DCI. For the second terminal device, these fields are read.

When the first control resource set is the same as the second control resource set, for the first terminal device, the indicated information or value of some fields (parameters) in the DCI is configured through predefined or through high-layer signaling, and when the first terminal device and the second terminal detect the same DCI, the length (detection range) of the DCI read by the first terminal device can be reduced, which effectively reduces the complexity of the first terminal device that needs to read the DCI, and reduces the energy consumption of the first terminal device.

Optionally, in some embodiments of the present application, when the first control resource set corresponding to the first SIB1 is the same as the second control resource set corresponding to the second SIB1, in this case, the same control resource may be associated with two different PDCCHs. That is, although the first control resource set corresponding to the first SIB1 is the same as the second control resource set corresponding to the second SIB1, the first control resource set or the second control resource may correspond to (include) two or more PDCCHs. For the sake of distinction, the PDCCH corresponding to the first SIB1 is referred to as a first PDCCH, and the PDCCH corresponding to the second SIB1 is referred to as a second PDCCH. Wherein the first PDCCH and the second PDCCH are different. The first SIB1 corresponds to a DCI (referred to as a first DCI) and the second SIB1 corresponds to a DCI (referred to as a second DCI) differently. In this case, the first terminal device acquires the control resource set through the Dmrs-type a-Position field, and needs to further distinguish which PDCCH on the control resource set the first DCI is detected on. Accordingly, the first PDCCH may be scrambled with a first radio access network temporary identifier (RNTI), and the first PDCCH carries the first DCI. And scrambling a second PDCCH by using a second RNTI, wherein the second PDCCH bears second DCI. Wherein, the corresponding relationship between the PDCCH and the corresponding scrambling mode may be predefined or configured through higher layer signaling. For example, the first terminal device may descramble PDCCH (dci) with the first RNTI on the control resource set indicated by the Dmrs-type a-Position field, and the PDCCH (dci) that is descrambled successfully is the first PDCCH. The first terminal device may acquire the first SIB in the PDSCH according to the first DCI carried by the first PDCCH. And the second terminal equipment descrambles the PDCCH (DCI) by using the second RNTI on the same control resource set, and the PDCCH (DCI) which is descrambled successfully is the second PDCCH. The first terminal device may acquire the second SIB in the PDSCH according to the second DCI carried by the second PDCCH. Wherein the first RNTI is different from the second RNTI

Optionally, in this embodiment of the present application, the first RNTI may be a U-RNTI (universal terrestrial radio access network temporary identifier), or the first RNTI is a C-RNTI (cell network temporary identifier). The second RNTI may be a second U-RNTI or a second C-RNTI. The first U-RNTI is different from the second U-RNTI, and the first C-RNTI is different from the second C-RNTI.

When the first control resource set is the same as the second control resource set and the same control resource may include multiple PDCCHs, different PDCCHs may be scrambled with different RNTIs, and a correspondence between different RNTIs and different PDCCHs may be configured in a predefined higher layer signaling. In this way, the first terminal device may determine the first PDCCH corresponding to the first RNTI utilized by the descrambled PDCCH, so as to obtain the first SIB1 carried on the PDSCH in the first DCI carried on the first PDCCH. So that the first terminal device may quickly access the system and acquire the first SIB 1. The communication efficiency is improved.

Optionally, in some possible implementations of the present application, the Dmrs-type a-Position field may be used to indicate that the first SIB1 is located at the first time-frequency Position. Wherein the first time frequency location is predefined or configured by higher layer signaling.

In particular, since the first SIB1 is carried on the PDSCH, the Dmrs-type a-Position field may also indicate that the first terminal device receives the first SIB1 at the first time-frequency location on the PDSCH. The first terminal device may not determine the time-frequency location of the first SIB1 on the PDSCH by blind detection PDCCH. Wherein the first time frequency location is predefined or configured by higher layer signaling. For example, when the Dmrs-TypeA-Position field indicates a 1, there corresponds a pre-configured or pre-defined first time-frequency Position. The first terminal device may determine to receive the first SIB1 at a first time-frequency location on the PDSCH according to the value indicated by the Dmrs-type a-Position field. When the Dmrs-TypeA-Position field indicates 0, it corresponds to another preconfigured or predefined time-frequency Position. The first terminal device may determine to receive the first SIB1 at the time-frequency location on the PDSCH according to the value indicated by the Dmrs-type a-Position field. Namely, there may be a corresponding relationship between the value indicated by the Dmrs-TypeA-Position field and the time-frequency Position. The correspondence may also be protocol predefined or configured by higher layer signaling.

The time-frequency Position on the PDSCH corresponding to the first SIB1 is indicated by the Dmrs-type A-Position field, and the first terminal can directly receive the first SIB1 on the PDSCH according to the time-frequency resource Position indicated by the Dmrs-type A-Position field. The accuracy and efficiency of acquiring the first SIB1 by the first terminal device can be improved, and implementation is facilitated.

Optionally, when the Dmrs-type a-Position field is 0 or 1, the first terminal device may also be instructed to acquire a control resource set corresponding to the first SIB1 according to a first parameter (e.g., the PDCCH-ConfigSIB1 field) in the first MIB, and detect a PDCCH on the control resource set corresponding to the first SIB1, where the PDCCH is used to schedule a physical downlink shared channel PDSCH carrying the first SIB. Further, the first SIB1 carried on the PDSCH is acquired.

Optionally, in some possible implementations of the present application, the Dmrs-type a-Position field may be used to indicate that the first PBCH corresponds to the first SIB 1. As shown in fig. 5, fig. 5 is a schematic flowchart of a method for MIB transmission in some embodiments of the present application, and based on the method steps shown in fig. 3, S240 in the method, the first terminal device acquires the first SIB1 according to the Dmrs-type a-Position field, including: and S243.

S243, the first terminal device obtains configuration information of a first SIB1 included in the first PBCH according to the first PBCH indicated by the Dmrs-type a-Position, where a time-frequency resource location of the first PBCH is predefined or configured through a higher layer signaling.

S244, the first terminal device acquires the first SIB1 according to the configuration information of the first SIB 1.

For reference, the above description about S210, S220, and S230 may be referred to in steps S210, S220, and S230 shown in fig. 5, and for brevity, the description is not repeated here.

In S243, the Dmrs-type a-Position field may be used to indicate the first PBCH to which the first SIB1 corresponds. In S220, the network device may transmit the first MIB to the first terminal device via the PBCH. For differentiation, the PBCH sent by the network device in S220 is referred to as a second PBCH (second SSB), and the second PBCH (second SSB) includes a first MIB, where the first MIB includes a Dmrs-type a-Position field, and the Dmrs-type a-Position field is used for the first terminal device to obtain the first system information block SIB 1. When the Dmrs-TypeA-Position field indicates the first PBCH, the first terminal device needs to re-receive the first PBCH. Wherein the time-frequency resource position of the first PBCH is predefined or configured through high-layer signaling. For example, when the Dmrs-type a-Position field indicates 1, there corresponds to a pre-configured or predefined first PBCH. When the Dmrs-TypeA-Position field indicates 0, it corresponds to another preconfigured or predefined first PBCH. Or, when the Dmrs-type a-Position field indicates 0, the first PBCH for indicating that the first SIB1 corresponds to the first PBCH is the same as the second PBCH. I.e. the first terminal device may associate the first PBCH according to the Dmrs-TypeA-Position field. There may also be a correspondence between the value indicated by the Dmrs-TypeA-Position field and the PBCH. The correspondence may also be protocol predefined or configured by higher layer signaling. And the first terminal equipment determines the time-frequency resource Position of the first PBCH according to the first PBCH indicated by the Dmrs-type A-Position, and then receives the first PBCH. After receiving the first PBCH, acquiring configuration information of the first SIB1 included in the first PBCH. The first PBCH may include MIB, and the configuration information of the first SIB1 may be included in MIB. The MIB may include contents similar to those shown in table 1. The configuration information of the first SIB1 may include: a control resource set and a search space corresponding to the first SIB1, a time domain symbol position where a first DMRS is located when the type-a PDSCH corresponding to the first terminal device is mapped, and the like. For example, the MIB in the first PBCH may include a PDCCH-ConfigSIB1 field for indicating the configuration of the PDCCH related to the first SIB1, including Coreset and search space in which the PDCCH is located, and the like. The MIB in the first PBCH may include a Dmrs-type a-Position field, which is used to indicate a time domain symbol Position where a first Dmrs is located when a type-a PDSCH corresponding to the first terminal device is mapped. The first ue may perform blind detection on the PDCCH on the control resource set indicated by the field of the PDCCH-ConfigSIB1, receive the PDSCH according to the DCI indication in the detected PDCCH, and read the information of the first SIB1 in the PDSCH after receiving the PDSCH. Thereby acquiring the first SIB 1.

The first PBCH corresponding to the first SIB1 is indicated by the Dmrs-TypeA-Position field, the first terminal can directly associate the first PBCH according to the indication of the Dmrs-TypeA-Position field, acquire the configuration information of the first SIB1 in the first PBCH, and further acquire the first SIB1, so that the first terminal device can access the system sequentially and quickly, and uplink synchronization, cell selection and the like can be realized. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

Optionally, in other possible embodiments of the present application, the Dmrs-type a-Position field may be used to indicate whether there is an update to the first SIB 1.

In particular, since the Dmrs-type a-Position field is used to instruct the first terminal device to acquire the first SIB 1. Thus, the Dmrs-TypeA-Position field may be used to indicate whether there is an update to the first SIB 1. Whether or not there is an update is relative to the previous SIB1 last acquired by the first terminal device. The prior SIB1 is SIB1 that the first terminal device can understand was acquired last (or before) interpreting the SSB.

When the Dmrs-type a-Position field indicates that there is no update to the first SIB1, e.g., when the Dmrs-type a-Position field is 1 or 0, it indicates that there is no update to the first SIB 1. The first terminal device may directly determine the previously acquired SIB1 as the first SIB 1. The first terminal device need not perform the various steps and procedures of acquiring the first SIB1 from the first SIB1 configuration information included in the currently received first MIB. The complexity of the first terminal device for acquiring the first SIB1 may be reduced, and the power consumption of the first terminal device may be reduced.

When the Dmrs-TypeA-Position field indicates that there is an update to the first SIB1, e.g., when the Dmrs-TypeA-Position field is 1 or 0, it indicates that there is an update to the first SIB 1. I.e. indicating that the first SIB1 is different with respect to the previous SIB1 last acquired by the first terminal device. The first terminal device needs to acquire the first SIB1 according to the configuration information of the first SIB1 included in the currently received first MIB. For example, the first terminal device needs to acquire a control resource set corresponding to the first SIB1 according to the PDCCH-ConfigSIB1 field in the first MIB, and detect a PDCCH on the control resource set corresponding to the first SIB1, where the PDCCH is used to schedule a Physical Downlink Shared Channel (PDSCH) carrying the first SIB. Further, the first SIB1 carried on the PDSCH is acquired.

According to the transmission method of the system information, the field (parameter) used for the Position of the DMRS of the TypeA PDSCH in the MIB is released/re-interpreted, for example, the field can be the field of the DMRS-TypeA-Position in the MIB, and the field is used for indicating the terminal equipment terminal with simple capability to access the NR system and acquire the SIB 1. The terminal equipment with simple capability can sequentially and quickly acquire the SIB1 and access the system, and realize uplink synchronization, cell selection and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

It should be understood that, in the embodiments of the present application, predefined may be understood as defined by a protocol. The signaling configuration may be understood as being configured by higher layer or physical layer signaling. The higher layer signaling may include, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) Control Element (CE), Radio Link Control (RLC) signaling, and the like. The physical layer signaling may include, for example, Downlink Control Information (DCI), signaling transmitted through a downlink physical layer channel, and the like, and the physical downlink channel may be, for example, a PDCCH, a PDSCH, or the like.

It should also be understood that the manner, the case, the category, and the division of the embodiments are only for convenience of description and should not be construed as a particular limitation, and features in various manners, the category, the case, and the embodiments may be combined without contradiction.

It should also be understood that the various numerical references referred to in the examples of the present application are merely for ease of description and distinction and are not intended to limit the scope of the examples of the present application. The sequence numbers of the above processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not be limited in any way to the implementation process of the embodiments of the present application.

It should also be understood that the above description is only for the purpose of facilitating a better understanding of the embodiments of the present application by those skilled in the art, and is not intended to limit the scope of the embodiments of the present application. Various equivalent modifications or changes will be apparent to those skilled in the art in light of the above examples given, for example, some steps in the method 200 described above may not be necessary, or some steps may be newly added, etc. Or a combination of any two or more of the above embodiments. Such modifications, variations, or combinations are also within the scope of the embodiments of the present application.

It should also be understood that the foregoing descriptions of the embodiments of the present application focus on highlighting differences between the various embodiments, and that the same or similar elements that are not mentioned may be referred to one another and, for brevity, are not repeated herein.

It should also be understood that in the embodiment of the present application, "predefining" may be implemented by saving corresponding codes, tables, or other manners that may be used to indicate related information in advance in a device (for example, including a terminal device and a network device), and the present application is not limited to a specific implementation manner thereof.

The transmission method of the system information according to the embodiment of the present application is described in detail with reference to fig. 1 to 5. Hereinafter, a communication device according to an embodiment of the present application will be described in detail with reference to fig. 6 to 12.

Fig. 6 shows a schematic block diagram of a communication apparatus 300 according to an embodiment of the present application, where the apparatus 300 may correspond to the first terminal device described in the method 200, or may be a chip or a component applied to the first terminal device, and each module or unit in the apparatus 300 is respectively configured to execute each action or process performed by the first terminal device in the method 200.

As shown in fig. 6, the apparatus 300 includes a transceiver unit 310 and a processing unit 320. The transceiving unit 310 is used for performing specific signal transceiving under the driving of the processing unit 320.

A transceiving unit 310 for receiving a first master information block MIB;

a processing unit 320, configured to obtain a parameter in the first MIB for indicating a DMRS position of a type-a physical downlink shared channel PDSCH, where the parameter is used to obtain a first system information block SIB1, where the first SIB1 includes access configuration information of a first device;

the processing unit 320 is further configured to acquire the first SIB1 according to the parameter.

The communication device provided by the application redefines the content of the field (parameter) indication of the parameter used for the DMRS Position of the type-A PDSCH in the MIB, for example, the field can be the field of DMRS-TypeA-Position in the MIB. The field is defined for the terminal equipment with simple capability to acquire the corresponding SIB1, so that the terminal equipment with simple capability can acquire the SIB1, thereby sequentially and quickly accessing the system and realizing uplink synchronization, cell selection and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

Optionally, in some embodiments of the present application, the parameter is used to indicate a control resource set corresponding to the first SIB 1; the processing unit 320 is further configured to detect a physical downlink control channel PDCCH on the control resource set corresponding to the first SIB1 indicated by the parameter, where the PDCCH is used to schedule a physical downlink shared channel PDSCH carrying the first SIB 1.

Optionally, in some embodiments of the present application, the control resource set corresponding to the first SIB1 is the same as or different from the control resource set corresponding to the second SIB1, where the first MIB includes a first parameter, the first parameter is used to indicate the control resource set corresponding to the second SIB1, and the second SIB1 includes access configuration information of the second apparatus.

Optionally, in some embodiments of the present application, when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, the first SIB1 in the PDSCH is acquired according to downlink control information DCI carried by a PDCCH in the control resource set corresponding to the first SIB1 and first information, where the first information is predefined or configured through higher layer signaling.

Optionally, in some embodiments of the present application, the first information may include: one or more of MCS, number of HARQ processes, NDI, RV field, etc.

Optionally, in some embodiments of the present application, when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, the processing unit is further configured to acquire the first SIB1 in the PDSCH according to downlink control information DCI carried by the first PDCCH. The first PDCCH is a PDCCH in the control resource set corresponding to the first SIB1, the first PDCCH is scrambled by using a first Radio Network Temporary Identifier (RNTI), the second PDCCH is a PDCCH in the control resource set corresponding to the second SIB1, the second PDCCH is scrambled by using a second RNTI, the first PDCCH is different from the second PDCCH, and the first RNTI is different from the second RNTI.

Optionally, in some embodiments of the present application, the first RNTI may be a first U-RNTI, or the first RNTI is a first C-RNTI. The second RNTI may be a second U-RNTI or a second C-RNTI. The first U-RNTI is different from the second U-RNTI, and the first C-RNTI is different from the second C-RNTI.

Optionally, in some embodiments of the present application, the parameter is used to indicate that the first SIB1 is received at a first time-frequency location, wherein the first time-frequency location is predefined or configured through higher layer signaling.

Optionally, in some embodiments of the present application, the parameter is used to indicate a first physical broadcast channel PBCH corresponding to the first SIB1, and the processing unit 320 is further configured to acquire the first SIB1 according to the first PBCH, where a time-frequency resource location of the first SIB is predefined or configured through higher layer signaling.

Optionally, in some embodiments of the present application, the parameter is used to indicate whether there is an update to the first SIB 1.

Optionally, in some embodiments of the present application, when the parameter indicates that there is no update to the first SIB1,

the processing element 320 is further configured to determine, according to the parameter, that the previous SIB1 is the first SIB1, and that the previous SIB1 is the SIB1 last acquired by the first apparatus.

Optionally, in some embodiments of the present application, when the parameter indicates that there is an update to the first SIB1,

the processing unit 320 is further configured to acquire the first SIB1 according to the configuration information of the first SIB1 indicated in the first MIB.

Optionally, in some embodiments of the present application, when the mapping type of the PDSCH carrying the first SIB1 is type a, the time domain symbol position where the first DMRS of the PDSCH carrying the first SIB1 is located is the 4 th time domain symbol in the time unit where the PDSCH is located.

Optionally, in some embodiments of the present application, the parameter (field) of the DMRS Position for the demodulation reference signal of the type-a PDSCH is a DMRS-type a-Position parameter (field).

Further, the apparatus 300 may also be a storage unit, and the transceiver unit 310 may be a transceiver, an input/output interface, or an interface circuit. The storage unit is used for storing instructions executed by the transceiver unit 310 and the processing unit 320. The transceiver 310, the processing unit 320 and the storage unit are coupled to each other, the storage unit stores instructions, the processing unit 320 is configured to execute the instructions stored by the storage unit, and the transceiver 310 is configured to perform specific signal transceiving under the driving of the processing unit 320.

It should be understood that, for the sake of brevity, please refer to the foregoing description related to the method 200 and the first terminal device of the related embodiments in fig. 3 to fig. 5 for the specific process of each unit in the apparatus 300 to execute the above corresponding step.

Optionally, the transceiver 310 may include a receiving unit (module) and a transmitting unit (module) for executing the steps of receiving and transmitting information by the first terminal device in the embodiments of the foregoing method 200 and the embodiments shown in fig. 3 to fig. 5.

It should be understood that the transceiving unit 310 may be a transceiver, an input/output interface, or an interface circuit. The storage unit may be a memory. The processing unit 320 may be implemented by a processor. As shown in fig. 7, the communication device 400 may include a processor 410, a memory 420, a transceiver 430, and a bus system 440. The various components of the communication device 400 are coupled together by a bus system 440, wherein the bus system 440 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 440 in fig. 7. For ease of illustration, it is only schematically drawn in fig. 7.

The communication apparatus 300 shown in fig. 6 or the communication apparatus 400 shown in fig. 7 are capable of implementing the steps performed by the first terminal device in the embodiments of the method 200 and the embodiments shown in fig. 3 to 5. Similar descriptions may refer to the description in the corresponding method previously described. To avoid repetition, further description is omitted here.

It should also be understood that the communication apparatus 300 shown in fig. 6 or the communication apparatus 400 shown in fig. 7 may be a simple-capable terminal device.

Fig. 8 shows a schematic block diagram of a communication apparatus 500 according to an embodiment of the present application, where the apparatus 500 may correspond to the network device described in the method 200, or may be a chip or a component applied to the network device, and each module or unit in the apparatus 500 is respectively configured to execute each action or process performed by the network device in the method 200.

As shown in fig. 8, the apparatus 500 may include a processing unit 510 and a transceiver unit 520. The transceiving unit 520 is used for performing specific signal transceiving under the driving of the processing unit 510.

A processing unit 510 for determining a first master information block, MIB, comprising a parameter for indicating a demodulation reference signal, DMRS, position for a type-a physical downlink shared channel, PDSCH, the parameter being for indicating a first system information block, SIB1, the first SIB1 comprising access configuration information of a first device

A transceiving unit 520, configured to transmit the first MIB.

The communication device provided by the application redefines the content of the field (parameter) indication of the parameter used for the DMRS Position of the type-A PDSCH in the MIB, for example, the field can be the field of DMRS-TypeA-Position in the MIB. The field is defined for the terminal equipment with simple capability to acquire the corresponding SIB1, so that the terminal equipment with simple capability can acquire the SIB1, thereby sequentially and quickly accessing the system and realizing uplink synchronization, cell selection and the like. The terminal equipment with simple capability can normally communicate, and the communication efficiency is improved.

Optionally, in some embodiments of the present application, the parameter is used to indicate a control resource set corresponding to the first SIB 1.

Optionally, in some embodiments of the present application, the control resource set corresponding to the first SIB1 is the same as or different from the control resource set corresponding to the second SIB1, where the first MIB includes a first parameter, the first parameter is used to indicate the control resource set corresponding to the second SIB1, and the second SIB1 includes access configuration information of the second apparatus.

Optionally, in some embodiments of the present application, when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, the first information in the downlink control information DCI carried by the PDCCH in the control resource set corresponding to the first SIB1 is predefined or configured through higher layer signaling.

Optionally, in some embodiments of the present application, the first information may include: one or more of MCS, number of hybrid automatic repeat request HARQ processes, NDI, RV, etc.

Optionally, in some embodiments of the present application, when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, a first PDCCH is scrambled by using a first RNTI, and a second PDCCH is scrambled by using a second RNTI, where the first PDCCH is a PDCCH in the control resource set corresponding to the first SIB1, the second PDCCH is a PDCCH in the control resource set corresponding to the second SIB1, the first PDCCH is different from the second PDCCH, and the first RNTI is different from the second RNTI.

Optionally, in some embodiments of the present application, the first RNTI may be a first U-RNTI, or the first RNTI is a first C-RNTI. The second RNTI may be a second U-RNTI or a second C-RNTI. The first U-RNTI is different from the second U-RNTI, and the first C-RNTI is different from the second C-RNTI.

Optionally, in some embodiments of the present application, the parameter is used to indicate that the first SIB1 is located at a first time-frequency location. Wherein the first time frequency location is predefined or configured by higher layer signaling.

Optionally, in some embodiments of the present application, the parameter is used to indicate a first physical broadcast channel PBCH corresponding to the first SIB1, and a time-frequency resource location of the first PBCH is predefined or configured through higher layer signaling.

Optionally, in some embodiments of the present application, the parameter is used to indicate whether there is an update to the first SIB 1.

Optionally, in some embodiments of the present application, when the mapping type of the PDSCH carrying the first SIB1 is type a, the time domain symbol position where the first DMRS of the PDSCH carrying the first SIB1 is located is the 4 th time domain symbol in the time unit where the PDSCH is located.

Optionally, in some embodiments of the present application, the parameter (field) of the DMRS Position for the demodulation reference signal of the type-a PDSCH is a DMRS-type a-Position parameter (field).

It should be understood that, for the sake of brevity, detailed descriptions of the specific processes of the units in the apparatus 500 to execute the corresponding steps described above are omitted here, referring to the foregoing description in conjunction with the method 200 and the network devices of the related embodiments in fig. 3 to fig. 5.

Optionally, the transceiver unit 520 may include a receiving unit (module) and a transmitting unit (module) for performing the steps of receiving and transmitting information by the network device in the embodiments of the foregoing method 200 and the embodiments shown in fig. 2 to 5.

Further, the apparatus 500 may also include the storage unit. The transceiving unit 520 may be a transceiver, an input/output interface, or an interface circuit. The storage unit is used for storing instructions executed by the transceiving unit 520 and the processing unit 510. The transceiver unit 520, the processing unit 510 and the storage unit are coupled to each other, the storage unit stores instructions, the processing unit 510 is configured to execute the instructions stored by the storage unit, and the transceiver unit 520 is configured to perform specific signal transceiving under the driving of the processing unit 510.

It should be understood that the transceiving unit 520 may be a transceiver, an input/output interface, or an interface circuit. The storage unit may be a memory. The processing unit 310 may be implemented by a processor. As shown in fig. 9, the communication device 600 may include a processor 610, a memory 620, and a transceiver 630.

The communication apparatus 500 shown in fig. 8 or the communication apparatus 600 shown in fig. 9 can implement the steps performed by the network device in the foregoing embodiments of the method 200 and the embodiments shown in fig. 3 to 5. Similar descriptions may refer to the description in the corresponding method previously described. To avoid repetition, further description is omitted here.

It should also be understood that the communication apparatus 500 shown in fig. 8 or the communication apparatus 600 shown in fig. 9 may be a network device.

It should also be understood that the division of the units in the above apparatus is only a division of logical functions, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And the units in the device can be realized in the form of software called by the processing element; or may be implemented entirely in hardware; part of the units can also be realized in the form of software called by a processing element, and part of the units can be realized in the form of hardware. For example, each unit may be a processing element separately set up, or may be implemented by being integrated into a chip of the apparatus, or may be stored in a memory in the form of a program, and a function of the unit may be called and executed by a processing element of the apparatus. The processing element, which may also be referred to herein as a processor, may be an integrated circuit having signal processing capabilities. In the implementation process, the steps of the method or the units above may be implemented by integrated logic circuits of hardware in a processor element or in a form called by software through the processor element.

In one example, the units in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), or a combination of at least two of these integrated circuit forms. As another example, when a unit in a device may be implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of invoking programs. As another example, these units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

Fig. 10 is a schematic structural diagram of a terminal device 700 provided in the present application. The above-described apparatus 300 or 400 may be configured in the terminal device 600. Alternatively, the apparatus 300 or 400 itself may be the terminal device 700. Alternatively, the terminal device 700 may perform the actions performed by the first terminal device in the method 200. Alternatively, the terminal device 700 may be a simple-capability terminal device.

For convenience of explanation, fig. 10 shows only main components of the terminal device. As shown in fig. 10, the terminal device 700 includes a processor, a memory, a control circuit, an antenna, and an input-output means.

The processor is mainly configured to process a communication protocol and communication data, control the entire terminal device, execute a software program, and process data of the software program, for example, to support the terminal device to perform the actions described in the above embodiment of the method for indicating a transmission precoding matrix. The memory is mainly used for storing software programs and data, for example, the codebook described in the above embodiments. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 10 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this application.

For example, the processor may include a baseband processor and a central processing unit, the baseband processor is mainly used for processing the communication protocol and the communication data, and the central processing unit is mainly used for controlling the whole terminal device, executing the software program, and processing the data of the software program. The processor in fig. 10 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

For example, in the embodiment of the present application, the antenna and the control circuit having the transceiving function may be regarded as the transceiving unit 701 of the terminal device 700, and the processor having the processing function may be regarded as the processing unit 702 of the terminal device 700. As shown in fig. 10, the terminal device 700 includes a transceiving unit 701 and a processing unit 202. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Optionally, a device in the transceiver unit 701 for implementing the receiving function may be regarded as a receiving unit, and a device in the transceiver unit 701 for implementing the transmitting function may be regarded as a transmitting unit, that is, the transceiver unit 701 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc.

Fig. 11 is a schematic structural diagram of another terminal device 800 provided in the present application. In fig. 11, the terminal device includes a processor 810, a transmission data processor 820, and a reception data processor 830. The processing unit 320 in the above embodiments may be the processor 810 in fig. 11, and performs corresponding functions. The transceiver unit 310 in the above embodiments may be the transmit data processor 820 and/or the receive data processor 830 in fig. 11. Although fig. 11 shows a channel encoder and a channel decoder, it is understood that these blocks are not limitative and only illustrative to the present embodiment.

Fig. 12 is a schematic structural diagram of a network device 900 according to an embodiment of the present application, which can be used to implement the functions of the network device in the foregoing method. The network device 900 includes one or more radio frequency units, such as a Remote Radio Unit (RRU) 901 and one or more baseband units (BBUs) (which may also be referred to as digital units, DUs) 902. The RRU 901 may be referred to as a transceiver unit, transceiver, transceiving circuitry, or transceiver, etc., which may include at least one antenna 9011 and a radio frequency unit 9012. The RRU 901 is mainly used for transceiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending signaling messages in the above embodiments to a terminal device. The BBU 902 section is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 901 and the BBU 902 may be physically disposed together or may be physically disposed separately, that is, distributed base stations.

The BBU 902 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing unit) 902 can be used to control the base station 90 to execute the operation flow related to the network device in the above-described method embodiment.

In an example, the BBU 902 may be formed by one or more boards, and the boards may support a radio access network of a single access system (e.g., an LTE system or a 5G system) together, or may support radio access networks of different access systems respectively. The BBU 902 also includes a memory 9021 and a processor 9022. The memory 9021 is used for storing necessary instructions and data. For example, the memory 9021 stores the codebook and the like in the above-described embodiment. The processor 9022 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedures related to the network device in the above method embodiments. The memory 9021 and the processor 9022 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

In one possible implementation, with the development of system-on-chip (SoC) technology, all or part of functions of the 902 part and the 901 part may be implemented by SoC technology, for example, by a base station function chip, which integrates a processor, a memory, an antenna interface, and other devices, and a program of related functions of the base station is stored in the memory, and the processor executes the program to implement the related functions of the base station. Optionally, the base station function chip can also read a memory outside the chip to implement the relevant functions of the base station.

It should be understood that the structure of the network device illustrated in fig. 12 is only one possible form, and should not limit the embodiments of the present application in any way. This application does not exclude the possibility of other forms of base station structure that may appear in the future.

It should be understood that in the embodiments of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are generated in whole or in part when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., DVDs), or semiconductor media. The semiconductor medium may be a solid state disk.

An embodiment of the present application further provides a communication system, including: the simple capability terminal equipment and the network equipment. Optionally, the communication system may further include a normal terminal device.

The embodiment of the present application further provides a computer-readable medium for storing a computer program code, where the computer program includes instructions for executing the method for transmitting system information in the embodiment of the present application in the method 200. The readable medium may be a read-only memory (ROM) or a Random Access Memory (RAM), which is not limited in this embodiment of the present application.

The present application also provides a computer program product comprising instructions that, when executed, cause a simple capable terminal device and a network device to perform operations corresponding to the first terminal device and the network device of the above method, respectively.

An embodiment of the present application further provides a system chip, where the system chip includes: a processing unit, which may be, for example, a processor, and a communication unit, which may be, for example, an input/output interface, a pin or a circuit, etc. The processing unit can execute computer instructions to enable a chip in the communication device to execute any one of the above methods for transmitting system information provided by the embodiments of the present application.

Optionally, any one of the communication devices provided in the embodiments of the present application may include the system chip.

Optionally, the computer instructions are stored in a storage unit.

Alternatively, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the terminal, such as a ROM or other types of static storage devices that can store static information and instructions, a RAM, and the like. The processor mentioned in any of the above may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the method for transmitting the main system information. The processing unit and the storage unit may be decoupled, and are respectively disposed on different physical devices, and are connected in a wired or wireless manner to implement respective functions of the processing unit and the storage unit, so as to support the system chip to implement various functions in the foregoing embodiments. Alternatively, the processing unit and the memory may be coupled to the same device.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

The terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The terms "upstream" and "downstream" appearing in the present application are used to describe the direction of data/information transmission in a specific scenario, for example, the "upstream" direction generally refers to the direction of data/information transmission from the terminal to the network side, or the direction of transmission from the distributed unit to the centralized unit, and the "downstream" direction generally refers to the direction of data/information transmission from the network side to the terminal, or the direction of transmission from the centralized unit to the distributed unit.

Various objects such as various messages/information/devices/network elements/systems/devices/actions/operations/procedures/concepts may be named in the present application, it is understood that these specific names do not constitute limitations on related objects, and the named names may be changed according to factors such as scenes, contexts or usage habits.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the unit is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), and random access.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (43)

1. A method for transmitting system information, comprising:

   receiving a first master information block MIB;

   acquiring a parameter in the first MIB for indicating a position of a demodulation reference signal (DMRS) of a type-A Physical Downlink Shared Channel (PDSCH), wherein the parameter is used for acquiring a first system information block (SIB 1), and the first SIB1 comprises access configuration information of a first device;

   acquiring the first SIB1 according to the parameters.
2. The method of claim 1, wherein the parameter indicates a set of control resources to which the first SIB1 corresponds;

   the obtaining the first SIB1 according to the parameter includes:

   and detecting a Physical Downlink Control Channel (PDCCH) on a control resource set corresponding to the first SIB1 indicated by the parameter, wherein the PDCCH is used for scheduling a Physical Downlink Shared Channel (PDSCH) carrying the first SIB 1.
3. The method of claim 2,

   the control resource set corresponding to the first SIB1 is the same as or different from the control resource set corresponding to the second SIB1, where the first MIB includes a first parameter indicating the control resource set corresponding to the second SIB1, and the second SIB1 includes access configuration information of a second apparatus.
4. The method of claim 3,

   when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, acquiring the first SIB1 in the PDSCH according to downlink control information DCI carried by a PDCCH in the control resource set corresponding to the first SIB1 and first information, where the first information is predefined or configured through higher layer signaling.
5. The method of claim 3,

   when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, acquiring the first SIB1 in the PDSCH according to Downlink Control Information (DCI) carried by a first PDCCH,

   the first PDCCH is a PDCCH in a control resource set corresponding to the first SIB1, the first PDCCH is scrambled by using a first Radio Network Temporary Identifier (RNTI), the second PDCCH is a PDCCH in a control resource set corresponding to the second SIB1, the second PDCCH is scrambled by using a second RNTI, the first PDCCH is different from the second PDCCH, and the first RNTI is different from the second RNTI.
6. The method of claim 1, wherein the parameter indicates that the first SIB1 is received at a first time-frequency location, wherein the first time-frequency location is predefined or configured through higher layer signaling.
7. The method of claim 1,

   the parameters are used to indicate a first physical broadcast channel PBCH to which the first SIB1 corresponds,

   the obtaining the first SIB1 according to the parameter includes:

   acquiring the first SIB1 according to the first PBCH, wherein a time-frequency resource location of the first PBCH is predefined or configured through higher layer signaling.
8. The method of claim 1, wherein the parameter indicates whether there is an update to the first SIB 1.
9. The method of claim 8, wherein when the parameter indicates that there is no update to the first SIB1, the obtaining the first SIB1 according to the parameter comprises:

   determining a previous SIB1 as the first SIB1, the previous SIB1 as a last acquired SIB1 of the first apparatus.
10. The method of claim 8, wherein when the parameter indicates that there is an update to the first SIB1, the obtaining the first SIB1 according to the parameter comprises:

    acquiring the first SIB1 according to the configuration information of the first SIB1 indicated in the first MIB.
11. The method according to any of claims 1 to 10, wherein when the mapping type of the PDSCH carrying the first SIB1 is type a, the time domain symbol on which the first DMRS of the PDSCH carrying the first SIB1 is located is the 4 th time domain symbol in the time unit on which the PDSCH is located.
12. A method for transmitting system information, comprising:

    determining a first master information block, MIB, comprising a parameter indicating a demodulation reference signal, DMRS, position for a type-a physical downlink shared channel, PDSCH, the parameter indicating a first system information block, SIB1, the first SIB1 comprising access configuration information of a first device;

    and sending the first MIB.
13. The method of claim 12, wherein the parameter indicates a set of control resources to which the first SIB1 corresponds.
14. The method of claim 13,

    the control resource set corresponding to the first SIB1 is the same as or different from the control resource set corresponding to the second SIB1, where the first MIB includes a first parameter indicating the control resource set corresponding to the second SIB1, and the second SIB1 includes access configuration information of a second apparatus.
15. The method of claim 14,

    when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, first information in downlink control information DCI carried by a PDCCH in the control resource set corresponding to the first SIB1 is predefined or configured through higher layer signaling.
16. The method of claim 14,

    when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, a first PDCCH is scrambled by using a first RNTI, and a second PDCCH is scrambled by using a second RNTI, wherein the first PDCCH is a PDCCH in the control resource set corresponding to the first SIB1, the second PDCCH is a PDCCH in the control resource set corresponding to the second SIB1, the first PDCCH is different from the second PDCCH, and the first RNTI is different from the second RNTI.
17. The method of claim 12, wherein the parameter indicates that the first SIB1 is located in a first time-frequency location, wherein the first time-frequency location is predefined or configured through higher layer signaling.
18. The method of claim 12,

    the parameter is used for indicating a first physical broadcast channel PBCH corresponding to the first SIB1, and a time-frequency resource location of the first PBCH is predefined or configured through higher layer signaling.
19. The method of claim 12, wherein the parameter indicates whether there is an update to the first SIB 1.
20. The method according to any of claims 12 to 19, wherein when the mapping type of the PDSCH carrying the first SIB1 is type a, the time domain symbol on which the first DMRS of the PDSCH carrying the first SIB1 is located is the 4 th time domain symbol in the time unit on which the PDSCH is located.
21. A communications apparatus, comprising:

    a transceiving unit for receiving a first master information block MIB;

    a processing unit, configured to acquire a parameter in the first MIB for indicating a DMRS position of a type-a physical downlink shared channel PDSCH, where the parameter is used to acquire a first system information block SIB1, and the first SIB1 includes access configuration information of a first device;

    the processing unit is further configured to acquire the first SIB1 according to the parameter.
22. The apparatus of claim 21, wherein the parameter indicates a set of control resources to which the first SIB1 corresponds;

    the processing unit is further configured to detect a physical downlink control channel PDCCH on a control resource set corresponding to the first SIB1 indicated by the parameter, where the PDCCH is used to schedule a physical downlink shared channel PDSCH carrying the first SIB 1.
23. The apparatus of claim 22,

    the control resource set corresponding to the first SIB1 is the same as or different from the control resource set corresponding to the second SIB1, where the first MIB includes a first parameter indicating the control resource set corresponding to the second SIB1, and the second SIB1 includes access configuration information of a second apparatus.
24. The apparatus of claim 23,

    when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, acquiring the first SIB1 in the PDSCH according to downlink control information DCI carried by a PDCCH in the control resource set corresponding to the first SIB1 and first information, where the first information is predefined or configured through higher layer signaling.
25. The apparatus of claim 23,

    when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, the processing unit is further configured to acquire the first SIB1 in the PDSCH according to downlink control information DCI carried by a first PDCCH,

    the first PDCCH is a PDCCH in a control resource set corresponding to the first SIB1, the first PDCCH is scrambled by using a first Radio Network Temporary Identifier (RNTI), the second PDCCH is a PDCCH in a control resource set corresponding to the second SIB1, the second PDCCH is scrambled by using a second RNTI, the first PDCCH is different from the second PDCCH, and the first RNTI is different from the second RNTI.
26. The apparatus of claim 21, wherein the parameter indicates that the first SIB1 is received at a first time-frequency location, wherein the first time-frequency location is predefined or configured through higher layer signaling.
27. The apparatus of claim 21,

    the parameters are used to indicate a first physical broadcast channel PBCH to which the first SIB1 corresponds,

    the processing unit is further configured to acquire the first SIB1 according to the first PBCH, where a time-frequency resource location of the first PBCH is predefined or configured through higher layer signaling.
28. The apparatus of claim 21, wherein the parameter indicates whether there is an update to the first SIB 1.
29. The apparatus of claim 28, wherein when the parameter indicates that there is no update to the first SIB1,

    the processing unit is further configured to determine, according to the parameter, that a previous SIB1 is the first SIB1, and that the previous SIB1 is a last SIB1 acquired by the first apparatus.
30. The apparatus of claim 28, wherein when the parameter indicates that there is an update to the first SIB1,

    the processing unit is further configured to acquire the first SIB1 according to the configuration information of the first SIB1 indicated in the first MIB.
31. The apparatus of any of claims 21-30, wherein when the mapping type of the PDSCH carrying the first SIB1 is type a, the time domain symbol on which the first DMRS on the PDSCH carrying the first SIB1 is located is the 4 th time domain symbol in the time cell on which the PDSCH is located.
32. A communications apparatus, comprising:

    a processing unit configured to determine a first master information block, MIB, the first MIB comprising a parameter indicating a demodulation reference signal, DMRS, position of a type-a physical downlink shared channel, PDSCH, the parameter indicating a first system information block, SIB1, the first SIB1 comprising access configuration information of a first device

    And the transceiving unit is used for sending the first MIB.
33. The apparatus of claim 32, wherein the parameter indicates a set of control resources to which the first SIB1 corresponds.
34. The apparatus of claim 33,

    the control resource set corresponding to the first SIB1 is the same as or different from the control resource set corresponding to the second SIB1, where the first MIB includes a first parameter indicating the control resource set corresponding to the second SIB1, and the second SIB1 includes access configuration information of a second apparatus.
35. The apparatus of claim 34,

    when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, first information in downlink control information DCI carried by a PDCCH in the control resource set corresponding to the first SIB1 is predefined or configured through higher layer signaling.
36. The apparatus of claim 34,

    when the control resource set corresponding to the first SIB1 is the same as the control resource set corresponding to the second SIB1, a first PDCCH is scrambled by using a first RNTI, and a second PDCCH is scrambled by using a second RNTI, wherein the first PDCCH is a PDCCH in the control resource set corresponding to the first SIB1, the second PDCCH is a PDCCH in the control resource set corresponding to the second SIB1, the first PDCCH is different from the second PDCCH, and the first RNTI is different from the second RNTI.
37. The apparatus of claim 32, wherein the parameter indicates that the first SIB1 is located in a first time-frequency location, wherein the first time-frequency location is predefined or configured through higher layer signaling.
38. The apparatus of claim 32,

    the parameter is used for indicating a first physical broadcast channel PBCH corresponding to the first SIB1, and a time-frequency resource location of the first PBCH is predefined or configured through higher layer signaling.
39. The apparatus of claim 32, wherein the parameter indicates whether there is an update to the first SIB 1.
40. The apparatus of any of claims 32 to 39, wherein when the mapping type of the PDSCH carrying the first SIB1 is type A, the time domain symbol on which the first DMRS of the PDSCH carrying the first SIB1 is located is the 4 th time domain symbol in the time cell on which the PDSCH is located.
41. An apparatus for communication, the apparatus comprising at least one processor coupled with at least one memory:

    the at least one processor configured to execute computer programs or instructions stored in the at least one memory to cause the apparatus to perform the method of any of claims 1-11, or the method of any of claims 12-20.
42. A computer-readable storage medium having stored thereon a computer program or instructions which, when read and executed by a computer, cause the computer to perform the method of any one of claims 1 to 11, or 12 to 20.
43. A chip, comprising: a processor for calling and running a computer program from a memory so that a communication device in which the chip is installed performs the method of any one of claims 1 to 11, or the method of any one of claims 12 to 20.

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